STM8S903K3 STMicroelectronics, STM8S903K3 Datasheet - Page 25

• Manufacturer Part Number: STM8S903K3
• Description: 16 MHz STM8S 8-bit MCU, up to 8 Kbytes Flash, 1 Kbyte RAM, 640 bytes EEPROM
• Manufacturer: STMicroelectronics

Specifications of STM8S903K3

• Program Memory: 8 Kbytes Flash; data retention 20 years at 55 °C after 10 kcycles
• Data Memory: 640 bytes true data EEPROM; endurance 300 kcycles
• Ram: 1 Kbytes
• Advanced Control Timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization

STM8S903K3 STM8S903F3
5.5
SDIP
32
6
7
8
9
10
11
12
13
14
UFQFPN/
LQFP32
1
2
3
4
5
6
7
8
9
Pin name
NRST
PA1/ OSCIN
PA2/ OSCOUT
V SS
VCAP
V DD
PA3/ TIM5_CH3 [SPI_NSS]
[UART1_TX]
PF4 [UART1_RX]
PB7
1. (HS) high sink capability.
2. (T) true open drain (P-buffer and protection diode to V
3. [ ] alternate function remapping option (if the same alternate function is shown twice, it
Pin description
[UART1_TX][SPI_NSS]/TIM5_CH3/PA3(HS)
indicates an exclusive choice not a duplication of the function).
(2)
TIM5_CH1[UART1_CK]BEEP/PD4(HS)
AIN4/TIM5_CH2/ADC_ETR/PD3(HS)
[TIM1_BKIN]I2C_SDA/PB5(T)
Table 6: UFQFPN32/LQFP32/SDIP32 pin description
AIN6/UART1_RX/PD6(HS)
AIN5/UART1_TX/PD5(HS)
[TIM1_CH4]TLI/PD7(HS)
Type
I/O
I/O
I/O
S
S
S
I/O
I/O
I/O
[UART1_RX]/PF4
Input
floating
X
X
X
X
X
OSCOUT/PA2
OSCIN/PA1
Figure 6: STM8S903K3 SDIP32 pinout
wpu
X
X
X
X
X
X
NRST
VCAP
V DD
V SS
PB7
PB6
Ext.
interrupt
DocID15590 Rev 6
X
X
X
X
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Output
High
sink
HS
(1)
Speed
O1
O1
O3
O1
O1
OD
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
X
X
X
X
X
PP
X
X
X
X
X
PD2(HS)[AIN3][TIM5_CH3]
PD1(HS)/SWIM
PD0(HS)/TIM1_BKIN[CLK_CCO]
PC7(HS)/SPI_MISO[TIM1_CH2]
PC6(HS)/SPI_MOSI[TIM1_CH1]
PC5(HS)/SPI_SCK[TIM5_CH1]
PC4(HS)/TIM1_CH4/CLK_CCO[AIN2][TIM1_CH2N]
PC3(HS)/TIM1_CH3[TLI][TIM1_CH1N]
PC2(HS)/TIM1_CH2[TIM1_CH3N]
PC1(HS)/TIM1_CH1/UART1_CK[TIM1_CH2N]
PE5/SPI_NSS[TIM1_CH1N]
PB0(HS)/AIN0/TIM1_CH1N
PB1(HS)/AIN1/TIM1_CH2N
PB2(HS)/AIN2/TIM1_CH3N
PB3(HS)[AIN3]TIM1_ETR
PB4(T)/I2C_SCL[ADC_ETR]
Main
function
(after
reset)
Reset
Port
A1
Port
A2
Digital ground
1.8 V regulator capacitor
Digital power supply
Port
A3
Port
F4
Port
B7
DD
Default alternate function
not implemented).
Resonator/ crystal in
Resonator/ crystal out
Timer 52 channel 3
Pinout and pin description
Alternate function after remap
[option bit]
SPI master/ slave select
[AFR1]/ UART1 data transmit
[AFR1:0]
UART1 data receive [AFR1:0]
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